-4 1) Terrain Awareness Warning System (TAWS)/Ground Proximity Warning System (GPWS) (Class A or B required)

Terrain Awareness Warning System (TAWS)/Ground Proximity Warning System (GPWS) (Class A or B required)

1. 
   Alternate procedures are established and used, and
   
2. 
   Repairs are made within two flight days.
   

1. 
   Exercise extreme caution and vigilance with regard to vertical descent rate, radar altimeter readouts, recognizing signs of windshear, and
   
2. 
   In the event of a windshear encounter, promptly act to counter the effects of the windshear as described in the appropriate aircraft manuals.
   

Any mode that is operative may be used.

1. 
   Exercise caution and vigilance with regard to vertical descent rate, radar altimeter readouts, recognizing signs of windshear, and
   
2. 
   In the event of a windshear encounter, promptly act to counter the effects of the windshear as described in the appropriate aircraft manuals.
   

(Class A TAWS required)

1. 
   Alternate procedures are established and used, and
   
2. 
   Repairs are made within two flight days.
   

(Class B TAWS required by FAR)

1. 
   Alternate procedures are established and used, and
   
2. 
   Repairs are made within two flight days.
   

1. 
   GPWS is considered inoperative, and
   
2. 
   Repairs are made within two flight days.
   

1. 
   Exercise extreme caution and vigilance with regard to vertical descent rate, radar altimeter readouts, recognizing signs of windshear, and
   
2. 
   In the event of a windshear encounter, promptly act to counter the effects of the windshear as described in the appropriate aircraft manuals.
   
3. 
   TAWS alerts are not to be considered reliable.
   

1. 
   Exercise extreme caution and vigilance with regard to vertical descent rate, radar altimeter readouts, recognizing signs of windshear, and
   
2. 
   In the event of a windshear encounter, promptly act to counter the effects of the windshear as described in the appropriate aircraft manuals.
   

1. 
   Advisory callout not required by FAR, and
   
2. 
   Alternate procedures are established and used.
   

1. 
   Exercise extreme caution and vigilance with regard to vertical descent rate, radar altimeter readouts, recognizing signs of windshear, and
   
2. 
   In the event of a windshear encounter, promptly act to counter the effects of the windshear as described in the appropriate aircraft manuals.
   

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(Class A TAWS required by FAR)

1. 
   Exercise extreme caution and vigilance with regard to vertical descent rate recognizing signs of windshear, and
   
2. 
   In the event of a windshear encounter, promptly act to counter the effects of the windshear as described in the appropriate aircraft manuals.
   

1. 
   Alternate procedures are established and used, and
   

2. 
   Windshear Detection and Avoidance System (Predictive) operates normally.
   

1. 
   Exercise extreme caution and vigilance with regard to vertical descent rate, radar altimeter readouts, recognizing signs of windshear, and
   
2. 
   In the event of a windshear encounter, promptly act to counter the effects of the windshear as described in the appropriate aircraft manuals.
   

1. 
   Exercise extreme caution and vigilance with regard to vertical descent rate, radar altimeter readouts, recognizing signs of windshear, and
   
2. 
   In the event of a windshear encounter, promptly act to counter the effects of the windshear as described in the appropriate aircraft manuals.
   

(Class A TAWS required)

***